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Recognised as Colour

#647A71

  • #647A71
  • Cyan
  • Dark
  • Nearest: Gray

#647A71 is a cyan with RGB values 100, 122, 113 and HSL 155°, 10%, 44%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Gray.

Colour values

#647A71#647A71
HEX#647A71
RGBrgb(100, 122, 113)
RGB (0–1)0.3922, 0.4784, 0.4431
RGB percentages39.2%, 47.8%, 44.3%
HSLhsl(155.5, 9.9%, 43.5%)
HSV / HSBhsv(155.5, 18%, 47.8%)
CMYK18%, 0%, 7.4%, 52.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,584,945
CSS custom property--colour: #647A71;

Brightness & contrast

Relative luminance0.17821WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.6:1
Contrast with white4.6:1WCAG normal text: AA
Contrast with black4.56:1WCAG normal text: AA
Greyscale equivalent#757575
Inverted#9B858E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#797771no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#757472no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#5F7A77no blue cones; rare, and affects men and women equally; ΔE 3.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.6:1WCAG large text: AAA
Contrast with black, large text4.56:1WCAG large text: AAA

Named colours

Gray · ΔE 11.1Dim grey · ΔE 11.3Slate grey · ΔE 15.5Light slate grey · ΔE 16.8Cadetblue · ΔE 18.1Dark slate grey · ΔE 19.1
Nearest named CSS colourGray (#808080)ΔE 11.12, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7A646D
Analogous#647A66, #64787A
Triadic#71647A, #7A7164
Split complementary#7A6478, #7A6664
Tetradic#66647A, #7A646D, #787A64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1D9D6
Lighter +30%#B5C2BD
Lighter +20%#99ABA4
Lighter +10%#7D948B
Darker −10%#4D5E57
Darker −20%#36423D
Darker −30%#1F2623
Darker −40%#080A09
More saturated +25%#489676
Less saturated −25%#6F6F6F

Channel breakdown

R100
G122
B113
Red100 (39.2%)
Green122 (47.8%)
Blue113 (44.3%)
Hue155.45°
Saturation (HSL)9.91%
Lightness43.53%
Dominant channelGreen
Hex per channelR 64 · G 7A · B 71

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Every value on this page was computed from “647a71” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.